Which two capabilities of Cisco DNA Center make it more extensible? (Choose two.)

Which two capabilities of Cisco DNA Center make it more extensible? (Choose two.)

A. REST APIs that allow for external applications to interact natively with Cisco DNA Center B. adapters that support all families of Cisco IOS software C. SDKs that support interaction with third-party network equipment D. modular design that is upgradable as needed E. customized versions for small, medium, and large enterprises